Malicious PDF — malware analysis report

Static analysis result for SHA-256 2384174678854434…

MALICIOUS

PDF

72.4 KB Created: 2021-08-31 02:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c68fed23c435edc12e4eb1c5565c25d7 SHA-1: 59a9f0390c2e2e6537e5a9496a68e7fc49a94a22 SHA-256: 2384174678854434c3e967ad91263a94b6185023ce33bee7864704e91c73e140
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and the numerous external links strongly indicate an attempt to lead the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://shannonlakeestates.org/fck_images/file/74356538143.pdf In PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5674d9e6a6af059785f7161aff3c1ef6/tesepoxorip.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/wodit.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e8c3440bf---fumonutevudosepewa.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/lijakitefivupuk.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a26334ce5---81766011662.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/78136616963.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/r7rgb89alu3s2rvb0932k7oq01/67335105199.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ce65e10f4b32b12f7435e05b9ddef0a8/norine.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/66476116519.pdfIn PDF document text
    • http://sakurahoaanhdao.com/webroot/img/files/49774269461.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/vegikasugij.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a64b172833---63452164246.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16074d6fe021a9---zovaja.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/89636361608.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/matuzoxa.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/4l1lm8qq637el6gve7sus1f5h3/86464830055.pdfIn PDF document text
    • http://qca.ch/userfiles/file/86114577325.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5e6e1248e2d51da04d30b23371c4a075/36779194740.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160784fe6c948f---katodekexit.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/kapifekebubozivid.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/34662217008.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/54641803784.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/fimijel.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/pebasujatugifabodutiji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=national+vision+policy+malaysiaPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 14320 bytes
SHA-256: ab5cb1d3626ac228e916607e992fba256d808079ae5da121035018e01d839f24
font_02_sfnt_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 10460 bytes
SHA-256: 0dbf39d6d73183cb1e1e98ebf630f9ac4739cff2040e7d9f1f86ccf40f2a12b6

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